/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.streampipes.processors.enricher.jvm.processor.expression;

import org.apache.streampipes.model.runtime.Event;

import org.apache.commons.jexl3.JexlEngine;
import org.apache.commons.jexl3.JexlScript;
import org.apache.commons.jexl3.MapContext;

public class JexlEvaluator {

  private final JexlDescription jexlDescription;
  private final JexlScript script;

  public JexlEvaluator(JexlDescription jexlDescription,
                       JexlEngine engine) {
    this.jexlDescription = jexlDescription;
    this.script = engine.createScript(jexlDescription.script());
  }

  public void evaluate(MapContext context,
                       Event event) {
    event.addField(jexlDescription.getFieldName(), script.execute(context));
  }
}
